1 /* Functions specific to running GDB native on HPPA running GNU/Linux.
3 Copyright (C) 2004-2015 Free Software Foundation, Inc.
5 This file is part of GDB.
7 This program is free software; you can redistribute it and/or modify
8 it under the terms of the GNU General Public License as published by
9 the Free Software Foundation; either version 3 of the License, or
10 (at your option) any later version.
12 This program is distributed in the hope that it will be useful,
13 but WITHOUT ANY WARRANTY; without even the implied warranty of
14 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
15 GNU General Public License for more details.
17 You should have received a copy of the GNU General Public License
18 along with this program. If not, see <http://www.gnu.org/licenses/>. */
25 #include "linux-nat.h"
27 #include <sys/procfs.h>
28 #include <sys/ptrace.h>
29 #include <linux/version.h>
31 #include <asm/ptrace.h>
32 #include "hppa-linux-offsets.h"
34 #include "hppa-tdep.h"
36 /* Prototypes for supply_gregset etc. */
39 /* These must match the order of the register names.
41 Some sort of lookup table is needed because the offsets associated
42 with the registers are all over the board. */
44 static const int u_offsets[] =
46 /* general registers */
115 /* Floating point regs. */
126 PT_FR10, PT_FR10 + 4,
127 PT_FR11, PT_FR11 + 4,
128 PT_FR12, PT_FR12 + 4,
129 PT_FR13, PT_FR13 + 4,
130 PT_FR14, PT_FR14 + 4,
131 PT_FR15, PT_FR15 + 4,
132 PT_FR16, PT_FR16 + 4,
133 PT_FR17, PT_FR17 + 4,
134 PT_FR18, PT_FR18 + 4,
135 PT_FR19, PT_FR19 + 4,
136 PT_FR20, PT_FR20 + 4,
137 PT_FR21, PT_FR21 + 4,
138 PT_FR22, PT_FR22 + 4,
139 PT_FR23, PT_FR23 + 4,
140 PT_FR24, PT_FR24 + 4,
141 PT_FR25, PT_FR25 + 4,
142 PT_FR26, PT_FR26 + 4,
143 PT_FR27, PT_FR27 + 4,
144 PT_FR28, PT_FR28 + 4,
145 PT_FR29, PT_FR29 + 4,
146 PT_FR30, PT_FR30 + 4,
147 PT_FR31, PT_FR31 + 4,
151 hppa_linux_register_addr (int regno, CORE_ADDR blockend)
155 if ((unsigned) regno >= ARRAY_SIZE (u_offsets))
156 error (_("Invalid register number %d."), regno);
158 if (u_offsets[regno] == -1)
162 addr = (CORE_ADDR) u_offsets[regno];
169 * Registers saved in a coredump:
174 * sar, iir, isr, ior, ipsw
179 #define GR_REGNUM(_n) (HPPA_R0_REGNUM+_n)
180 #define TR_REGNUM(_n) (HPPA_TR0_REGNUM+_n)
181 static const int greg_map[] =
183 GR_REGNUM(0), GR_REGNUM(1), GR_REGNUM(2), GR_REGNUM(3),
184 GR_REGNUM(4), GR_REGNUM(5), GR_REGNUM(6), GR_REGNUM(7),
185 GR_REGNUM(8), GR_REGNUM(9), GR_REGNUM(10), GR_REGNUM(11),
186 GR_REGNUM(12), GR_REGNUM(13), GR_REGNUM(14), GR_REGNUM(15),
187 GR_REGNUM(16), GR_REGNUM(17), GR_REGNUM(18), GR_REGNUM(19),
188 GR_REGNUM(20), GR_REGNUM(21), GR_REGNUM(22), GR_REGNUM(23),
189 GR_REGNUM(24), GR_REGNUM(25), GR_REGNUM(26), GR_REGNUM(27),
190 GR_REGNUM(28), GR_REGNUM(29), GR_REGNUM(30), GR_REGNUM(31),
192 HPPA_SR4_REGNUM+1, HPPA_SR4_REGNUM+2, HPPA_SR4_REGNUM+3, HPPA_SR4_REGNUM+4,
193 HPPA_SR4_REGNUM, HPPA_SR4_REGNUM+5, HPPA_SR4_REGNUM+6, HPPA_SR4_REGNUM+7,
195 HPPA_PCOQ_HEAD_REGNUM, HPPA_PCOQ_TAIL_REGNUM,
196 HPPA_PCSQ_HEAD_REGNUM, HPPA_PCSQ_TAIL_REGNUM,
198 HPPA_SAR_REGNUM, HPPA_IIR_REGNUM, HPPA_ISR_REGNUM, HPPA_IOR_REGNUM,
199 HPPA_IPSW_REGNUM, HPPA_RCR_REGNUM,
201 TR_REGNUM(0), TR_REGNUM(1), TR_REGNUM(2), TR_REGNUM(3),
202 TR_REGNUM(4), TR_REGNUM(5), TR_REGNUM(6), TR_REGNUM(7),
204 HPPA_PID0_REGNUM, HPPA_PID1_REGNUM, HPPA_PID2_REGNUM, HPPA_PID3_REGNUM,
205 HPPA_CCR_REGNUM, HPPA_EIEM_REGNUM,
210 /* Fetch one register. */
213 fetch_register (struct regcache *regcache, int regno)
215 struct gdbarch *gdbarch = get_regcache_arch (regcache);
219 if (gdbarch_cannot_fetch_register (gdbarch, regno))
221 regcache_raw_supply (regcache, regno, NULL);
225 /* GNU/Linux LWP ID's are process ID's. */
226 tid = ptid_get_lwp (inferior_ptid);
228 tid = ptid_get_pid (inferior_ptid); /* Not a threaded program. */
231 val = ptrace (PTRACE_PEEKUSER, tid, hppa_linux_register_addr (regno, 0), 0);
233 error (_("Couldn't read register %s (#%d): %s."),
234 gdbarch_register_name (gdbarch, regno),
235 regno, safe_strerror (errno));
237 regcache_raw_supply (regcache, regno, &val);
240 /* Store one register. */
243 store_register (const struct regcache *regcache, int regno)
245 struct gdbarch *gdbarch = get_regcache_arch (regcache);
249 if (gdbarch_cannot_store_register (gdbarch, regno))
252 /* GNU/Linux LWP ID's are process ID's. */
253 tid = ptid_get_lwp (inferior_ptid);
255 tid = ptid_get_pid (inferior_ptid); /* Not a threaded program. */
258 regcache_raw_collect (regcache, regno, &val);
259 ptrace (PTRACE_POKEUSER, tid, hppa_linux_register_addr (regno, 0), val);
261 error (_("Couldn't write register %s (#%d): %s."),
262 gdbarch_register_name (gdbarch, regno),
263 regno, safe_strerror (errno));
266 /* Fetch registers from the child process. Fetch all registers if
267 regno == -1, otherwise fetch all general registers or all floating
268 point registers depending upon the value of regno. */
271 hppa_linux_fetch_inferior_registers (struct target_ops *ops,
272 struct regcache *regcache, int regno)
277 regno < gdbarch_num_regs (get_regcache_arch (regcache));
279 fetch_register (regcache, regno);
283 fetch_register (regcache, regno);
287 /* Store registers back into the inferior. Store all registers if
288 regno == -1, otherwise store all general registers or all floating
289 point registers depending upon the value of regno. */
292 hppa_linux_store_inferior_registers (struct target_ops *ops,
293 struct regcache *regcache, int regno)
298 regno < gdbarch_num_regs (get_regcache_arch (regcache));
300 store_register (regcache, regno);
304 store_register (regcache, regno);
308 /* Fill GDB's register array with the general-purpose register values
312 supply_gregset (struct regcache *regcache, const gdb_gregset_t *gregsetp)
315 const greg_t *regp = (const elf_greg_t *) gregsetp;
317 for (i = 0; i < sizeof (greg_map) / sizeof (greg_map[0]); i++, regp++)
319 int regno = greg_map[i];
320 regcache_raw_supply (regcache, regno, regp);
324 /* Fill register regno (if it is a general-purpose register) in
325 *gregsetp with the appropriate value from GDB's register array.
326 If regno is -1, do this for all registers. */
329 fill_gregset (const struct regcache *regcache,
330 gdb_gregset_t *gregsetp, int regno)
334 for (i = 0; i < sizeof (greg_map) / sizeof (greg_map[0]); i++)
336 int mregno = greg_map[i];
338 if (regno == -1 || regno == mregno)
340 regcache_raw_collect(regcache, mregno, &(*gregsetp)[i]);
345 /* Given a pointer to a floating point register set in /proc format
346 (fpregset_t *), unpack the register contents and supply them as gdb's
347 idea of the current floating point register values. */
350 supply_fpregset (struct regcache *regcache, const gdb_fpregset_t *fpregsetp)
355 for (regi = 0; regi <= 31; regi++)
357 from = (const char *) &((*fpregsetp)[regi]);
358 regcache_raw_supply (regcache, 2*regi + HPPA_FP0_REGNUM, from);
359 regcache_raw_supply (regcache, 2*regi + HPPA_FP0_REGNUM + 1, from + 4);
363 /* Given a pointer to a floating point register set in /proc format
364 (fpregset_t *), update the register specified by REGNO from gdb's idea
365 of the current floating point register set. If REGNO is -1, update
369 fill_fpregset (const struct regcache *regcache,
370 gdb_fpregset_t *fpregsetp, int regno)
374 for (i = HPPA_FP0_REGNUM; i < HPPA_FP0_REGNUM + 32 * 2; i++)
376 /* Gross. fpregset_t is double, registers[x] has single
378 char *to = (char *) &((*fpregsetp)[(i - HPPA_FP0_REGNUM) / 2]);
379 if ((i - HPPA_FP0_REGNUM) & 1)
381 regcache_raw_collect (regcache, i, to);
385 void _initialize_hppa_linux_nat (void);
388 _initialize_hppa_linux_nat (void)
390 struct target_ops *t;
392 /* Fill in the generic GNU/Linux methods. */
395 /* Add our register access methods. */
396 t->to_fetch_registers = hppa_linux_fetch_inferior_registers;
397 t->to_store_registers = hppa_linux_store_inferior_registers;
399 /* Register the target. */
400 linux_nat_add_target (t);